Described as the fastest-selling play in British history, few other British theatre productions have received such intensive coverage ahead of their official opening as Benedict Cumberbatch's Hamlet. Kirsty Lang is joined by The Observer theatre critic Susannah Clapp to review the production. In the 125th anniversary year of Agatha Christie's birth, her grandson, Mathew Prichard, discusses an exhibition of previously unpublished rare photographs from the family's personal collection. Andrew Miller, who won the Costa Book of the Year Award for his last novel set during the French Revolution, discusses his new book The Crossing. Following the impact of a family tragedy on a young couple, it is set in the present day. Andrew Miller discusses his departure from historical fiction and writing from the viewpoint of a female protagonist. We Are Your Friends stars Zac Efron as Cole Carter, an aspiring DJ attempting to make music and big money on the LA club circuit. A coming of age tale, Cole is caught between the demands of his school friends and his new mentor. In the week that Calvin Harris was announced as the highest earning DJ, Radio 1's film critic Rhianna Dhillon discusses the phenomenon of the superstar DJ. Presenter: Kirsty Lang Producer: Rebecca Armstrong.